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Different model families have different defaults and constraints for Chat Completions API parameters. For the full model list, see the Model List.

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Parameter Comparison

When temperature is close to 0, n can only be 1. Otherwise, the API returns invalid_request_error.

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Kimi K2.7 Code series — thinking Parameter

The kimi-k2.7-code series includes kimi-k2.7-code and its high-speed variant kimi-k2.7-code-highspeed; the two are the same model with identical parameter constraints (including the table above and the thinking behavior) and differ only in output speed (referred to collectively as kimi-k2.7-code below). kimi-k2.7-code is code-focused, and all parameter constraints except thinking are identical to kimi-k2.6. Unlike kimi-k2.6, its thinking is always on and cannot be disabled (passing {"type": "disabled"} errors), and Preserved Thinking is always on (thinking.keep is treated as "all" whether omitted or set to "all"; any other invalid value errors). So you do not need to pass the thinking parameter — just switch the model, and the model always emits reasoning_content. For details, see Using Thinking Models.

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Kimi K2.6 — thinking Parameter

Kimi K2.6 supports the thinking parameter to control whether deep thinking is enabled. Accepts {"type": "enabled"} or {"type": "disabled"}. Since the OpenAI SDK doesn’t have a native thinking parameter, use extra_body: 
completion = client.chat.completions.create(
    model="kimi-k2.6",
    messages=[
        {"role": "user", "content": "Hello"}
    ],
    extra_body={
        "thinking": {"type": "disabled"}
    },
    max_tokens=1024*32,
)